If Three 90% Confidence Intervals for a Population Proportion P

question 43

Multiple Choice

If three 90% confidence intervals for a population proportion p are calculated based on three independent samples selected randomly from the population, then the simultaneous confidence level will be

• A) about 73%
• B) exactly 90%
• C) exactly 81%
• D) exactly 270%
• E) None of the above answers are correct.

---

Definitions:

Sleep Spindles

Short bursts of brain activity detectable by an EEG that occur during stage 2 of sleep, associated with learning, memory, and brain development.

Stage 2 Sleep

A phase of sleep characterized by specific brain wave activity, including sleep spindles and K complexes, representing a deeper sleep than Stage 1.

EEG Record

A recording of the electrical activity of the brain obtained through electrodes placed on the scalp, used in the diagnosis of neurological conditions and the study of brain functions.

REM Rebound

The phenomenon where an individual experiences increased REM sleep following REM sleep deprivation, often resulting in more vivid dreams.